"the new york times" says it happened in pakistan before osama bin laden was killed. the cia set up a fake vaccination program in the town where it thought bin laden was hiding. the idea was to secure a dna sample from bin laden or a family member. no dna was obtained reportedly but the pakistani doctor who ran that program has now been arrested. >>> as the tenth anniversary of 9/11 gets closer, public interest in the world trade center site is now surging. tickets to the site's new memorial were made available monday and the online reservation system nearly crashed because of all the traffic. sean hennessey of wcbs tv has more on that. >> reporter: ever since the 9/11 terror attacks, the world trade center site has stood apart, a seemingly perpetual construction site, off limits and unwelcoming to the public. but that will all change in september when people will finally be allowed on the now hal ode ground where the towers once stood. after ten years, finally a fitting memorial to the 2,983 victims of the attacks including those who died at the pentagon. aboard unit